Biology

climate change

a long term change in the Earth's temperature and weather patterns

Fossils

Fossils show what lived in the past and reveal past climates.

Atmosphere

Layers of gas surrounding the earth: nitrogen,co2,methane

What causes climate change in the atmosphere

Changes in the balance of gases in the atmosphere can affect Earth's temperature.

Greenhouse gases

trap heat in the atmosphere

Global warming

the rise in earths temperature

natural causes of climate change

Volcanic eruptions, burning fossil fuels which increases greenhouse gases

How do scientists gather evidence of climate change?

they study natural evidence to learn about past climates.

Fossil meaning

Fossils are the preserved remains

of ancient living things.

Ice cores

long cylinders of ice collected by drilling deep into glaciers and ice sheets

ice cores past evidence

ice cores analyze the trapped air in the ancient ice to find the mixture of gases in the atmosphere many years ago.

Pollen

a fine powder produced by plants.

Pollen evidence

Pollen shows which plants grew in the past and whether the climate was warm or cold.

modern climate change

Scientists measure temperature, rainfall, sea levels and ice to track climate changes.

Peer review

other scientists examine research before publication in a scientific journal

weather

mix of atmospheric events taking place in a particular area at a particular time.